Rotary abutment pump or motor



Nov. 29, 1949 c. G. MULLER 2,489,800

ROTARY ABUTMENT PUMP 0R MOTOR Filed Nov. 4, 1946 2 Sheets-Sheet 1 C. a 40445) IN VEN TOR.

rToin/E Nov. 29, 1949 c. ca. MULLER 2,489,800

ROTARY ABUTMENT PUMP OR MOTOR Filed Nov. 4, 1946 2 Sheets-Sheet 2 INVENTOR. C G: m4; 5/?

Hymn/En Patented Nov. 29, 1949 UNITED STATES. FATENT FFICE ROTARY ABUTMENT PUMP R MOTOR Christopher G. Muller, Willcox, Ariz.

Application November 4, 1946, Serial No. 707,617

3 Claims. (Cl. 103143) My invention relates to fluid motors and pumps, and it has among its outstanding general ob jects to provide a device of the character indicated which is simple in construction, relatively inexpensive to manufacture, and highly efiicient in practical use in that itincorporates no delicate parts likely to get out of order.

More specifically, it is an object of the invention to provide in a device of this kind novel valves and control means therefor for'efiecting m the case of'a pump the drawing in and eXpul-' sion of fluid; or in the case of a motor the admissionfofand expulsion of a motive fluid.

ditionally and more specifically stated, the invention contemplates a device as indicated which involves twin rotors preferably spaced from one another within a casing, valves associated with each rotor, an interconnection between corresponding valves of the respective rotors, and means for controlling the valves preferably taking the form of a pin and groove arrangement associated with at least one set of valves and an adjacent casing portion.

Still another object of the invention is to providein a pumpor motor, means associated with its casing closure for controlling the operation of one or more rotor-carried valves.

A further object-of the invention is to provide a fl uid pump or motor including a casingcarried rib for spacing two'fluid actuating (or actuated) rotors, said rib having a five-fold function in that it firstly seals fluid grooves in adjacentrotors; secondly, carries an operative connection between corresponding valves of the respective rotors; thirdly, provides a separating bearing for the respective rotors; fourthly, provides circumferentially spaced fluid inlets and outlets for fluid grooves; and, flfthly, carries laterally projecting fluid damming bosses received in the respective fluid grooves of adjacent rotors between the fluid inlets and outlets of same.

The foregoing and other objects and advantages of the invention will be readily apparent to those skilled in the art upon reference to the accompanying drawings which illustrate a preferred example of my inventive concept.

It is to be understood, however, that the invention is susceptible of any other mechanical expressions within the spirit and scope of the sub jectmatter claimed hereinafter.

In the drawings, wherein the same reference characters have been used to designate the same parts throughout the several views,

Figurel is a perspective View of a pump or motor embodying my invention;

Figure 2 is a central cross-sectional view through the unit of Figure 1;

Figure 3 is a sectional view taken on the line 3-3 of Figure 2 and looking in the direction of the arrows;

Figure 4 is another sectional view taken on the line 44 of Figure 2;

Figure 5 is a view of one of the outer casing closure plates, it having been taken on the line 5--5 of Figure 2.

Referring to the drawings by reference characters, l 0 is a base which is adapted to be bolted to a suitable support (not shown). The pump or motor comprehends the annular casing l l which is open at each end and is provided with the medial inwardly extending circumferential rib Ila.

Rotatable in contact with the inner end of the circumferential casing rib Ha is the central medial disk l2 which is keyed, or otherwise made fast to, the concentric shaft l3. This shaft I3 is the power input shaft in the case of a pump and the power take-off shaft in the case of a motor, it being understood, as heretofore indicated, that the unit is adapted, without structural change, to be used as either a pump or a motor.

The shaft 93 as indicated in Fig. 2 extends through bushed concentrically located and aligned holes It in duplicate closure plates l5. These closure plates i5 take the form of annular disks and the shaft is is supported at opposite sides of the casing in bearings I which are received in cup-like members lila. The endless marginal flanges of the cup members l5a are secured by means of machine screws It?) or the like to the outer surface of the closure plates l5 about the bushed openings i l thereof. The bearing assemblies ice are of the ball bearing race type and are standard. Hence, a detailed illustration of same has not been deemed necessary.

The closure plates l5 of the casing H are secured to the latter by means of machine screws 1 or the like it as indicated in Figures 1 and 2.

In carrying out the invention'l employ in the illustrated instance two fluid actuating (or, in the case of a motor, actuated) disk form rotors !'I each of which is fast on the shaft l3 at opposite sides of the rotatable central disk 52. Each rotor H has a circular inner surface fluid-receiving groove l'fi'b, as shown. The respective disk-form rotors ii are adapted to substantially fully occupy and revolve in the spaces between closure plates 55 and the central partition which is provided by the casing rib Ha and the rotatable central disk [2. The closure plates l5 retain the respective shaft driving or rotor disks l! in assembly.

As I have shown in Figures 2 and 3, each of the rotor disks I! has diametrically opposite circular cut-outs Ila within which rotatably fit the disk valves I8. The valve-receiving cut-outs Ila of each rotor 11 are preferably, although not necessarily, aligned with one another.

Each of the disk valves l8 has an arcuate groove [8a in its inner surface indicated at I811, and this groove Isa conforms in width, depth and curvature to the inner surface groove I'll) of the related rotor disk H. The function of this groove arrangement Hb, 18a will be understood as the description proceeds, it being noted that casing rib i la contacts the rotors H to seal the fluid grooves l'ib thereof.

Having reference now to Figures 2, .3 and 4 it will be noted particularly from an inspection of Figure 2 that the medial casin rib Ha has projecting laterally from each side a fluid damming boss is. These fluid damming bosses l9 extend into the respective fluid-receiving rotor grooves l'lb between the inlets and outlets Zia, 26a thereof-which latter also extend through rib Ha to the exterior of casing ll. Bosses 59 have a substantially fluid tight flt in grooves l'lb.

Figures 3 and 4 illustrate the casing l l as having an inlet passage 2! connecting through rib Ha with the rib-provided inlet passage 2 la. Figures 3 and also indicate the casing-provided fluid outlet passage 20 connecting with the ribprovided outlet passage 26a.

It will be understood from the foregoing and from inspection of the drawings that when either of the disks i8 approaches the related boss 49 of its groove ill) the disk is adapted to be turned so as to allow the boss to pass through the groove 8a of said disk to allow for the exhaust and admission of fluid, or vice versa, as the case may be, from th passages 26a, Zia.

To effect the above mentioned control of the valves, I preferably provide each adjacent closure plate 55 with a pair of radially spaced grooves 22 (as illustrated in Fig. 5). These grooves are adapted to receive the laterally projecting pins extending from the disk valves is at oppositesides of their centers. Actuation of the valves to the groove alignin position, as shown (lower right) Fig. 3, is effected by the cam portions 22a of the closure plate grooves 22. As soon as a boss id has been passed by a valve E8, the closure grooves 22 coact with the valve carried pins 23 to swing the valves 18 to the operative grooveclosing position indicated at the upper left in Figure 3 so as to effect the pulling in of fluid in the case of a pump or drive of the rotors i! by the fluid impinging against the valve 58 in the case of a motor.

Adjacent valves !8 of each of the rotor disks 5? (when they are aligned, as they preferably will be) are connected by the concentric pin 24, it being understood that related valves are keyed to said pin 24. The pin 24 extends through a sleeve 25 in the central shaft-carried disk 52 as best indicated in Figure 2. The operation of one valve 98, therefore, effects operation of the related. valve is of the other rotor IT.

The use of two pins 23 for each of the valves 3 at opposite sides of the center thereof is desirable to obviate possibility of the valves jamming due to sticking of one pin 23 in its closureprovided groove 22. By providing the pin and '4 groove valve control 22, 23 in each of the closure plates l5, much greater smoothness in valve operation and less strain is achieved.

A power import or take-off pulley 26 is provided on the shaft l3 as indicated in Figure 1.

Having thus described my invention, what I claim as my invention is:

1. A rotary-type fluid pump or motor comprising, a substantially circular open-ended casing forming a cylindrical chamber and provided with an internal circumferentially-extending integral rib portion which projects into said chamber towards the axis thereof, closure plates detachably secured to the open ends of said casing, an axial shaft journalled in said plates, said rib portion being arranged to divide said chamber into a pair of separate rotor-receiving spaces, a central disk member disposed within the inner circumference of said rib portion and fastened to said shaft, separate rotor members disposed within each of said spaces and secured to said shaft and rotatable relative to said casing in close contact with said rib portion and with opposite sides of said central member, each of said rotor members being provided with an annular fluid-receiving groove therein and circular cut-out portions, said cut-out portions in each rotor member being diametrically-opposed, disk-like valve members rotatably disposed within said cut-out portions, fluid damming bosses extending laterally from opposite sides of said rib portion into said fluid-receiving grooves, said casing and rib portion being provided with a fluid inlet at one side of each of said bosses and a fluid outlet at the other side thereof, the faces of said valve members which are adjacent said bosses being provided with arcuate grooves which are adapted to intermittently coincide with said fluid-receiving grooves to permit passage of said bosses, and means for actuating said valve members so as to align the valve-grooves with said fluid-receiving grooves.

2. A rotary-type fluid pump or motor comprising, a substantially circular open-ended casing forming a cylindrical chamber and provided with an internal circumferentially-extending integral rib portion which projects into said chamber towards the axis thereof, closure plates detachably secured to the open ends of said casing, an axial shaft journalled in said plates, said rib portion being arranged to divide said chamber into a pair of separate rotor-receiving spaces, a central disk member disposed within the inner circumference of said rib portion and fastened to said shaft, separate rotor members disposed within each of said spaces and secured to said shaft and rotatable relative to said casing in close contact with said rib portion and with opposite sides of said central member, each of said rotor members being provided with an annular fluid-receiving groove therein and circular cutout portions, said cut-out portions in each rotor member being diametrically-opposed, disk-like valve member rotatably disposed within said outout portions, fluid damming bosses extending laterally from opposite sides of said rib portion into said fluid-receiving grooves, said casing and rib portion being provided with a fluid inlet at one side of each of said bosses and a fluid outlet at the other side thereof, the faces of said valve members which are adjacent said bosses being provided with arcuate grooves which are adapted to intermittently coincide with said fluid-receiving grooves to permit passage of said bosses, means for actutaing said valve members so as to align the valve-grooves with said fluid-receiving grooves, and means carried by said central member for operatively connecting corresponding valve members of the respective rotor members for simultaneous movement.

3. A rotary-type fluid pump or motor comprising, a substantially circular open-ended casing forming a cylindrical chamber and provided with an internal circumferentially-extending integral rib portion which projects into said chamber towards the axis thereof, closure plates detachably secured to the open ends of said casing; an axial shaft journalled in said plates, said rib portion being arranged to divide said chamber into a pair of separate rotor-receiving spaces, a. central disk member disposed within the inner circumference of said rib portion and fastened to said shaft, separate rotor members disposed within each of said spaces and secured to said shaft and rotatable relative to said casing in close contact with said rib portion and with opposite sides of said central member, each of said rotor members being provided with an annular fluid-receiving groove therein and circular cut-out portions, said cut-out portions in each rotor member being diametricallyopposed, disk-like valve members rotatably disposed within said cut-out portions, fluid damming bosses extending laterally from opposite sides of said rib portion into said fluid-receiving grooves, said casing and rib portion being provided with a fluid inlet at one side of each of said bosses and a fluid outlet at the other side thereof, the faces of said valve members which are adjacent said bosses being provided with arcuated grooves which are adapted to intermittently coincide with said fluid-receiving grooves to permit passage of said bosses, and means for actuating said valve members so as to align the valve-grooves with said fluid-receiving grooves, said valve-actuating means comprising interengaging pin and groove means carried by the inner faces of said closure plates and adjacent faces of said valve members.

CHRISTOPHER G. MULLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,096,804 Eggleton May 12, 1914 1,279,913 Roberts Sept. 24, 1918 

